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- W34851659 abstract "Maternal diabetes induces baroreflex dysfunction in the offspring. In a companion work (Lin et al. 2008, EB Abstract), we demonstrated that maternal diabetes altered the activity of Ca2+ and Ca2+—activated K+ channels of NA cardiac motoneurons in the neonatal mice of diabetic mothers. In the present study, neonatal mice from FVB control and OVE26 diabetic mothers (mated with FVB fathers) received tracer XRITC injections into the pericardial sac on postnatal days 7–9. Two days later, membrane currents of XRITC-labeled NA cardiac motoneurons in brainstem slices were recorded using a whole-cell patch technique. Compared with control, our data indicated that maternal diabetes significantly increased: 1) K+ channel activity of transient outward currents but not persistent currents evoked by voltage steps, 2) Cd2+ (calcium channel blocker cadmium)-sensitive K+ channel conductance for transient outward currents but not persistent currents (n=8; p<0.05), 3) ChTX (BK channel blocker charybdotoxin)-sensitive K+ channel conductance for both the transient and persistent outward currents, and the maximum values of ChTX-sensitive transient and persistent currents at +40 mV (n=13; p<0.05). Thus, we conclude that the increased BK channel activity contributes to the decreased excitability of NA cardiac motoneurons in the neonatal mice of diabetic mothers. NIHRO1 HL-79636." @default.
- W34851659 created "2016-06-24" @default.
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- W34851659 date "2008-03-01" @default.
- W34851659 modified "2023-09-23" @default.
- W34851659 title "Maternal Diabetes Increases a Large Conductance Ca2+‐activated K+ (BK) Current of Cardiac Motoneurons in the Nucleus Ambiguus (NA) of Neonatal Mice" @default.
- W34851659 doi "https://doi.org/10.1096/fasebj.22.1_supplement.950.6" @default.
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